Keywords: Tibury Fort AD 1588.png en A 19th century engraving of a 16th century drawing showing the works at Tilbury in preparation for the Spanish Armada in 1588 probably to the design of Italian engineer Federigo Giambelli or Genibelli The original D-shaped blockhouse can be seen in the front and centre of the fort 2015-03-01 Cruden Robert Peirce 1843 The History of the Town of Gravesend William Pickering London p 246 https //archive org/stream/historyoftownofg00crud page/n269/mode/2up Unknown 1843 other versions PD-old-70-1923 Uploaded with UploadWizard Tilbury Fort Spanish Armada |